Trace Elements in West Virginia Coals

Selenium
(Se) Summary Statistics

Selenium in West Virginia coals averaged 4.20 ppm (± 2.83
ppm) with a histogram skewed toward low values and a maximum value of 21.3
ppm in a bench of the Stockton coal. Selenium correlates only slightly
with thorium (r = +0.6032) and not at all with ash yield (r = +0.4525),
total sulfur, pyritic sulfur or any other trace elements.